(1)3050克=3.05千克;
(2)48千克=0.048吨;
(3)0.32平方分米=32平方厘米;
(4)0.65厘米=0.0065米;
(5)1元2角4分=1.24元.
故答案为:3.05,0.048,32,0.0065,1.24.